Overview
The PCAL9555AHF,128 is a low-voltage 16-bit General Purpose Input/Output (GPIO) expander designed by NXP USA Inc. This component is specifically tailored for I²C-bus/SMBus applications and features interrupt capabilities along with weak pull-up resistors. It is housed in a 24-WFQFN (Wafer Level Fine Pitch Ball Grid Array) package with an exposed pad, making it suitable for a variety of embedded systems and IoT devices.
Key Specifications
| Parameter | Value |
|---|---|
| Number of GPIOs | 16 |
| Interface | I²C-bus/SMBus |
| Package Type | 24-WFQFN Exposed Pad |
| Voltage Range | 1.65 V to 5.5 V |
| Operating Temperature | -40°C to 85°C |
| RoHS Status | RoHS3 Compliant |
Key Features
The PCAL9555AHF,128 boasts several key features that make it a versatile and reliable choice for various applications. These include:
- Low-Voltage Operation: The component operates within a voltage range of 1.65 V to 5.5 V, making it compatible with a wide range of systems.
- Interrupt Capability: It features interrupt outputs that can be configured to alert the microcontroller of input state changes.
- Weak Pull-Up Resistors: Each I/O port can be configured with weak pull-up resistors to simplify circuit design.
- I²C-Bus/SMBus Compatibility: The component is fully compatible with I²C-bus and SMBus protocols, ensuring seamless integration into existing systems.
- High-Speed Operation: It supports fast-mode I²C-bus speeds up to 400 kHz.
Applications
The PCAL9555AHF,128 is suitable for a variety of applications, including:
- Embedded Systems: It is often used in embedded systems where additional GPIOs are required without increasing the microcontroller's pin count.
- IoT Devices: Its low power consumption and small footprint make it ideal for Internet of Things (IoT) devices.
- Industrial Automation: The component can be used in industrial automation to expand the I/O capabilities of control systems.
- Consumer Electronics: It is also used in consumer electronics to provide additional I/O ports for peripherals and sensors.
Q & A
- What is the PCAL9555AHF,128 used for?
The PCAL9555AHF,128 is a 16-bit General Purpose Input/Output (GPIO) expander used to increase the number of I/O ports available in a system.
- What interface does the PCAL9555AHF,128 use?
The component uses the I²C-bus/SMBus interface.
- What is the voltage range of the PCAL9555AHF,128?
The voltage range is from 1.65 V to 5.5 V.
- What package type does the PCAL9555AHF,128 come in?
The component is housed in a 24-WFQFN (Wafer Level Fine Pitch Ball Grid Array) package with an exposed pad.
- Is the PCAL9555AHF,128 RoHS compliant?
Yes, the PCAL9555AHF,128 is RoHS3 compliant.
- What are the key features of the PCAL9555AHF,128?
Key features include low-voltage operation, interrupt capability, weak pull-up resistors, and I²C-bus/SMBus compatibility.
- What are some common applications of the PCAL9555AHF,128?
Common applications include embedded systems, IoT devices, industrial automation, and consumer electronics.
- What is the operating temperature range of the PCAL9555AHF,128?
The operating temperature range is from -40°C to 85°C.
- Does the PCAL9555AHF,128 support fast-mode I²C-bus speeds?
Yes, it supports fast-mode I²C-bus speeds up to 400 kHz.
- How can I configure the interrupt outputs on the PCAL9555AHF,128?
The interrupt outputs can be configured to alert the microcontroller of input state changes according to the datasheet specifications.
